Lock and strike plate location marking means



Nov. 4, 1958 u. P. MARCHETTI LOCK AND STRIKE PLATE LOCATION MARKING MEANS Filed July 15, 1957 a A 7 W (k m fl N 7 n I 7 h 4 w 1} p 2 5 5 4 1 T2 5 J, J 1 I 1 we mmiiif m 1%. Wm h fl W l fll 6 M 2 W 9 u 9 2 Q J w 2% a 4 W 8 a 3 4 f M t a 1/ 1 a M a A I 1 2.3 s 2. v LA I j 4 M |l J I 2 2 2 1 2 a 5 I |.r|||| l w M f W 2 4 /V7 Kin!) EMF LOCK AND STRIKE PLATE LOCATION MARKIN lVlEAN S Ugo P. Marchetti, Van Nuys, Calif. Application July 15, 1957, Serial No. 672,077 14 Claims. '(Cl. 33 -194) instrumentality effective at a single setting to mark a door,

for the location of the clearances to be formed therein for the reception of a lock and the location on the jamb for-the location of the strike plate to 'be engaged by the lock bolt.

Another object of the invention is to provide a device of the above character having capacity for adjustment to accommodate doors of difierent thicknesses as well as different types of jambs associated therewith.

A further object of the invention is to provide a device of the above character which is simple and sturdy in construction, economical to manufacture andwhich is easily applied and reliable for its intended purpose.

With the foregoing objects in view, together with such additional objects and advantages as may subsequently appear, the invention resides in the parts, and in the construction, combination and arrangement of parts described, by way of example in the following specification of a presently preferred embodiment of the invention,-

reference being had to the accompanying drawings which form a part of said specification and in which drawings: Fig. ,1 is a side elevation of a door and jamb marking device embodying the invention and showing the portion thereof which marks the door,

Fig. 2 is an elevational view of the opposite side of the device showing the means which marks the location for the mortise for the strike plate on the jamb,

Figs. 3 and 4 are enlarged, fragmentary, sectional views taken, respectively, on the line 3-3 of Fig. 1 and the line 44 of Fig. 2,

Fig. 5 is a top plan view showing the device adjusted for and applied to mark the location of the lock and strike plate on an inside door, and

Fig. 6 is a view similar to Fig. 5 but showing the device as adjusted for an applied to an outer door and the jamb therefor.

Referring to the drawings, the illustrated embodiment of the invention comprises a base member 1 which, in position of use, is inflexible vertically of the door and jamb engaged thereby; said base member conveniently comprising a strip of resilient metal slightly wider than the vertical dimension of the lock face and strike plate, said base member having a strike plate location marking means 2 secured to one face thereof by screws 2', said marking means comprising a block 3 having a series of knife edges 4 on the face thereof opposite the base member arranged in the configuration of the strike plate and the lock bolt contacting extension thereof. Inside doors are stopped (see Fig. 5) by a stop strip S secured to the jamb J and such doors are of lesser thickness than outside doors. Also outside doors are stopped by a stop strip S of greater thickness than inside doors and such stops are customarily formed integrally with the jamb J as shown in Fig. 6. These are standard conditions and to that end the block 3 is located inwardly from the end of the base member 1 and together with the marking edges 4 thereof is of such thickness that the overhanging end of the base member 1 will clear the face of the stop strip S when the device is used on an inside door and the edge ofthe block 3 by engagement with the edge of the stop strip S correctly positions the edges for marking the location of the strike plate on the face of the jamb J. When the device is used in connection with an outside door, the end of the base member 1 engages the stop member portion S of the jamb J and again automatically correctly positions the edges 4 to mark the position of the strike plate for the thicker door.

.The opposite end of the base member 1 is bent at right angles toward the face opposite that which carries the strike plate location marking means to form a door engaging edge 5 engageable with the face of the door D or D' which will engage the stop when the door is closed. Inwardly of the edge 5 the base member is provided with an elongated slot 6 disposed along the medial longitudinal line of the base member and along which the door marking means 7 is adjustably secured on the side thereof carrying the strike plate marking means by a screw and nut 8 tightened just enough to allow relative movement without play between the means 7 and the base member anda screw and wing nut 9 operable to be loosened to allow adjustment of the marking means 7 longitudinally of the base member or to be tightened to prevent such movement. The marking means 7 comprises a strip of resilient metal of the same width as the base member including a run 10 extending parallel to the base member and having spaced holes through. which the screws 8 and 9 extend, a run 11 extending diagonally outwardly and toward the edge of the door, a run 12 spaced outwardly from and parallel to the edge of the door and a final run 13 extending generally parallel to and spaced from the side face of the door opposite the face engaged by. the edge 5 and extending beyond the location of the hole to be bored in the door for reception of the knob component of the lock. The run 12 carries a block 14 secured thereto by screws 15 which carries a series of a knife edges 16 effective to mark the location for the face plate of the lock and a punch element 17 positioned to indicate the position of the hole to be bored for reception of the bolt supporting portion of the lock. The run 13 carries a conical deformation 18 effective to mark the location of the hole to be bored for reception of the knob component of the lock.

All of these marking elements are so located with respect to one another that when the device is held against the edge of the door after having been adjusted for the thickness of the door, all of the markings will be in correct registry. The length of the slot 6 is such that when the device is to be used on an inside door, the door marking means 7 is moved until the screw 8 engages the end of the slot and when used for an outside door, the

marking means is moved until the screw 9 engages the opposite end of the slot. This positions the markings on the edge and side of the door in correct registry with the corresponding positions of the strike plate marking means so that when the lock and strike plate are installed, the bolt will enter the strike plate opening as the door engages the stop.

In use, the door is first marked at the vertical distance above the lower edge at which the lock is to be located. The device, having been adjusted for the thickness of the door, is then placed on the edge of the door in registry with the mark for height and while held in that position, the door with the device held thereon is moved toward closed position until the strike plate marking means engages the stop strip, the resilience of the base member 1 permitting it to be swung inwardly as indicated in Figs. 5 and 6 until it clears the surface of the jamb. While so held, the device is tapped by a hammer over the various marking means so that they all make the desired marks on the door and jamb, after which the device is removed and the various holes bored and mortises cut with assurance that the lock can be readily installed and will properly cooperate with the strike plate located in the mortise which has been cut in the jamb. Thus there has been provided a means by which the edge of a door and the jamb against which it is closed can be simultaneously marked for the various clearances required for a lock and its strike plate with assurance that the marks so made will be in proper horizontal and vertical position for the desired interengagement and wherein aside from the initial determination of the vertical position, no further measuring is required.

While in the foregoing specification there has been described a presently preferred embodiment of the invention, it is not to be inferred therefrom that the invention is limited to the exact form thereof above disclosed by way of example, and it will be understood that the invention embraces all such changes and modifications in the parts and in the construction, combination and arrangement of parts as shall come within the purview of the appended claims.

I I claim:

1. In a device for marking the positions for installation of a lock on a door and of the complementary strike plate on a jamb with reference to which the door is hingedly mounted in a single operation, a base member comprising a fiat resilient strip of metal supporting a means for marking the outline of a strike plate receiving mortise on one face thereof and adjacent to one end thereof, other means adjacent the other end of said base member and at the opposite side thereof for marking the outline of the mortise for the exposed end of a lock on the edge of a door, and means at the ends of said base member engageable, respectively and simultaneously, with a door stop on the jamb and with a side surface of the door effective to position both of said marking means in horizontal directions relative to the door stop and door side so that the bolt of a lock positioned in and located by the mortise in the door will engage the opening in a strike plate mounted in the mortise in the jamb.

2. A door and jamb marking device as claimed in claim 1 in which said base member carries means at both ends thereof eifective to determine the positions of both of said marking means to accommodate doors of different thickness.

3. A door and jamb marking device as claimed in claim 1 in which one of said marking means is adjustable longitudinally of said base member.

4. A door and jamb marking device as claimed in claim 1 in which said door edge marking means is adjustable longitudinally of said base member and the means engaging the side of the door with resultant ,adjustment of said marking means for doors of different thickness.

5. In a device for marking the positions for the mortises for a lock and strike plate on a hinged door and the jamb toward and away from which the door is movable in a single setting of the device, a base member comprising a resilient metal strip carrying a means at one end thereof effective to mark the position of a strike plate receiving mortise in the jamb at a predetermined horizontal distance from a stop strip associated with the jamb and carrying means at the opposite end thereof efiective to mark the location of the mortise for the front face of a lock in the edge of the door at a horizontal distance from a side of the door suchthat a lock positioned in the mortise in the door will cooperatively engage a strike plate located inthe mortise therefor in the jamb, means associated with said door edge marking means effective to indicate the position for a bo in h h. he loc bolt is mn ab and t e m ans effective to mark a side of the door to indicate the position of a hole extending transversely of the door in which the door knob supporting means is rotatable.

6. A door and jamb marking device as claimed in claim 5 in which said door edge and said door side marking means is carried by a metal strip mounted on said base member for movement to predetermined positions longitudinally of said base member to accommodate doors of different thickness.

7. A door and jamb marking device as claimed in claim 5 in which said base member carries means engaging the side surface of the door which is engageable with the stop strip on the jamb and in which said door edge marking means is carried by a member adjustable longitudinally of said base member and said door side engaging means with resultant compensation for doors of .difierent thickness.

8. A door and jamb marking device as claimed in claim 5 in which said door side engaging means engages the side of the door Whichengages a stop strip on the jamb and in which said door edge marking means comprises a metal strip carried by and adjustable longitudinally of said base member and carrying said door edge marking means, said metal strip including a portion disposed beyond the opposite side of the door and extending parallel thereto and carrying a pointed projection operable to mark the side of the door for the location of a transverse bore through the door for the reception of the knob supporting means of the lock.

9. In a device for marking in a single setting both the location of the lock receiving mortises and bores in a door and of the strike plate receiving mortise on a jamb having a stop strip relative to which the door is hingedly mounted, said device comprising a base member having at One end thereof a knife edge means effective upon impact to mark the outline of the mortise for the face plate of a lock on the edge of a door and simultaneously indicate the location of the bore in which the lock bolt is received, means engaging a side of the door effective to locate said marking means centered on the median plane of the door, a second knife edge means carried by the opposite end of said base member eifective upon impact to mark the outline of a strike plate receiving mortise of the jamb associated with the door, and means at said other end of said base member engageable with the stop strip on the jamb effective to locate the outline for the strike plate receiving mortise a distance from the stop strip which is complementary to the distance of the lock bolt from the side of the door engageable with the stop strip.

10. A door and jamb marking device as claimed in claim 9 including adjusting means for locating said mortises to accommodate doors of different thickness.

11. A door and jamb marking device as claimed in claim 9 including means efiective upon impact thereon to mark the location of a bore transversely of the door for reception of the knob supporting means of the lock.

12. A door and jamb marking device as claimed in claim 9 in which said stop strip engaging means includes two stop strip engaging surfaces disposed a different horizontal distance from said second knife edge means effective selectively to position said second knife edge means at either of two distances from the stop strip.

13. In a device for marking in a single operation the positions for installation of a lock on a door and of the complementary strike plate on a jamb with reference to which the door is hingedly mounted, an elongated base member which in position of use is inflexible vertically of the door and jamb to be marked, said base member having a means for marking the outline of a strike plate receiving mortise mounted on one face thereof and adjacent to one end thereof, other means adjacent the other end of said base member and at the opposite side thereof for marking the outline of the mortise of the exposed end of a lock on the edge of a door, and means at the ends of said base member engagable, respectively and simultaneously, with a door stop on the jamb and with a side surface of the door efiective to position both of said marking means in horizontal directions relative to the door stop and door side so that the bolt of a lock positioned and located by a mortise in the door located by said device will engage the opening in a strike plate mounted in the mortise in the jamb concurrently located by said device.

14. In a device for marking the positions for the mortises for a lock and strike plate on a hinged door and the j-amb toward and 'away from which the door is movable in a single setting of the device, an elongated base member which in position of use in inflexible vertically of the door and jamb engaged thereby; said base member carrying a means at one end thereof effective to mark the position of a strike plate receiving mortise in the jamb at a predetermined distance from the stop strip associated with the jamb, and carrying means at the opposite end thereof effective to mark the location of a mortise for the front face of a lock in the edge of the door at a horizontal distance from a side of the door such that a lock positioned in the mortise in the door will cooperatively engage a strike plate located in the mortise therefor in the jamb, means associated with said door edge marking means effective to indicate a position for a bore in which the lock bolt is movable, and other means efiective to mark a side of the door to indicate the position of a hole extending transversely of the door in which the door knob supporting means is rotatable.

References Cited in the file of this patent UNITED STATES PATENTS Lough Apr. 12, 1904 

